Automatic sending and receiving mode of the system which joints the terminal unit to the earphone microphone terminal of the portable transmitter and automatic sending and receiving mode null of the portable transmitter which utilizes the earphone microphone

摘要

PURPOSE: To provide the automatic call transmission reception system for a system whose terminal equipment connected to an earphone microphone terminal of a mobile communication equipment and the automatic call transmission reception system for the mobile communication equipment utilizing an earphone microphone. ;CONSTITUTION: When a transmission button of an operation section 18 of a facsimile terminal equipment 2 is depressed, a control section 17 activates a relay circuit in an incoming signal detection circuit 13, a relay contact 26 is closed to set a level of an earphone side lower. The level reduction is sent to a handy phone 1 via an earphone microphone terminal. A control circuit 11 detects it to start call transmission. On the other hand, when a call comes to the handy phone 1, the control circuit 11 starts an incoming call signal generating circuit 10 to generate an incoming call signal. When the incoming signal element 13 detects the incoming call signal, the relay contact 26 is closed to set a level at the earphone side of the earphone microphone terminal 3 low. It is detected by the control circuit 11 to stop the operation of the incoming call signal generating circuit 10 and to form a receptible state and the facsimile equipment 2 is connected to a telephone line of the handy phone 1.;COPYRIGHT: (C)1994,JPO&Japio